81d6077fc2
This commit adds basic support to run in compatibility mode with Flannel. This allows clusters running Flannel as their principal networking solution to leverage some advances Kilo features. In certain Flannel setups, the clusters can even leverage muti-cloud. For this, the cluster needs to either run in a full mesh, or Flannel needs to use the API server's external IP address.
56 lines
1.7 KiB
Go
56 lines
1.7 KiB
Go
// Copyright 2019 the Kilo authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package encapsulation
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import (
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"net"
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"github.com/squat/kilo/pkg/iptables"
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)
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// Strategy identifies which packets within a location should
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// be encapsulated.
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type Strategy string
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const (
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// Never indicates that no packets within a location
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// should be encapsulated.
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Never Strategy = "never"
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// CrossSubnet indicates that only packets that
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// traverse subnets within a location should be encapsulated.
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CrossSubnet Strategy = "crosssubnet"
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// Always indicates that all packets within a location
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// should be encapsulated.
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Always Strategy = "always"
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)
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// Encapsulator can:
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// * configure the encapsulation interface;
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// * determine the gateway IP corresponding to a node;
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// * get the encapsulation interface index;
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// * set the interface IP address;
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// * return the required IPTables rules;
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// * return the encapsulation strategy; and
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// * clean up any changes applied to the backend.
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type Encapsulator interface {
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CleanUp() error
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Gw(net.IP, net.IP, *net.IPNet) net.IP
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Index() int
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Init(int) error
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Rules([]*net.IPNet) []iptables.Rule
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Set(*net.IPNet) error
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Strategy() Strategy
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}
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